Pump.



P. A. MYERS.

PUMP.

APPLICATION FILED JUNE 5,1911. 1,014,664, Patented Ja11.16,1912.

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P. A. MYERS.

PUMP.

APPLICATION FILED mm: s, 1911.

1,014,664, Patented Jan. 16,1912.

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P. A. MYERS.

PUMP.

APPLICATION FILED JUNE 5, 1911.

Patented Jan. 16, 1912.

fi zm .1 7am of Ohio,

UNITED STATES PATENT OFFICE.

PHILIP A. MYERS, OF ASHLAND, OHIO, ASSIGNOR T0 1:. E. MYERS AND BROTHER, OF ASHLAND, OHIO, A COPARTNERSHIP.

PUMP.

Specification of Letters Patent.

Patented Jan. 16,1912.

To (1 whom 1 6 may concern:

Be it known that I, Prnur A. MYERS, a citizen of the United States, residing at Ashland, in the county of Ashland and State have invented certain new and useful Improvements in Pumps, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to pumps and more particularly to that class of pumps which include a rack and gear as a part of the operating mechanism.

The object of the invention is to simplify the construction of pumps of this character, to reduce the size of the rack and gear and to reduce to a minimum the friction to which the moving parts of the operating mechanism are su jected.

To this end it is a further object of the invention to provide improved means for retaining the rack and gear in mesh one with the other and to prevent binding of these parts.

In the accompanying drawings, Figure 1 is a vertical, sectional view, taken through a pump embodying my invention, showing the operating mechanism in elevation; Fig. 2 is a side elevation of a modified form of the operating mechanism; Fig. 3 is a similar new of an operating mechanism embodying the invention in another form; and Fig. 4: is a front elevation of the invention applied to a double piston pump.

In the several forms of the invention herein illustrated I have shown the same applied to a pump comprising a body portion and a pump rod reciprocally mounted therein to actuate the pumping devices and a handle connected with the pump rod to impart reciprocatory movement thereto. The character of the gears employed, the manner of supporting the same and the manner of supporting the handle may all be varied to adapt the invention to diiferent types of pump and to accommodate the same to varying circumstances. In that form of the invention illustrated in Fig. 1 I have shown the same as applied to a pump of ordinary construction and comprising a body portion 1 having mounted therein the usual pump rod 2, to the lower end of which are attached the pumping devices, which are not here shown. Connected with the pump rod above the body portion 1 is a gear which is held against rotatory movement and reciproeates with the pump rod. This gear is preferably in the form of a segmental rack, as indicated at 8, having a hollow shank 4 to receive the pump rod. The rack is secured to the pump rod by means of a removable pin 5 extending through the shank 4 and the rod. An operating handle 6 is pivotally mounted upon the pump. In the form of pump here shown this handle is pivotally connected to the upper end of an oscillator 7 which is pivotally mounted at its lower end on a part carried by the body portion of the pump. The handle is provided with a segmental gear 8 which meshes with the segmental rack 3 carried by the pump rod. The oscillator 7 being pivotally supported permits the handle as a whole to move inward and outward as the segmental gear 8 travels over the rack 3. By means of this arrangement of the gears a long powerful stroke can be secured by the use of a comparatively small rack and gear. In the present instance the gear carried by the handle has but five teeth, whereas it is customary in the old style pumps to use a gear having eight or more teeth. Further, it is possible to vary the stroke of the pump rod by using racks having radii of different length. Consequently by using a rack having a longer or shorter pitch radius, the length of the movement imparted to the pump rod will be increased or decreased proportionately.

To maintain the gear in mesh with the rack at all times and to accomplish this without causing any binding of these parts I provide a device which is connected with both the rack and the gear and is so arranged that it will permit of the swinging action of the gear 8 as it travels over the rack 3. In the present instance this device comprises a link 9 pivotally connected at one end to the rack 3 on the center of its pitch line and pivotally connected at the other end to the gear 8 on the center of its pitch line. As the segmental gear rides over the'segmental rack the distance between these centers is always the same. Consequently, the link will not interfere in any way with the action of the gears but will maintain the same in their proper operative relations. In that form of the device here shown there are two links, 9, one arranged on each side of the rack and gear. The two links, however, act together and constitute a. single connecting device.

In that form of the invention shown in Fig. 2 I have illustrated the same as applied to a pump in which the power is exerted on the pump rod on the downward movement, as is the case with certain spray pumps. As shown in this figure the body portion of the pump is indicated at 1 0 and the pump rod 11 is mounted therein ur the usual manner. In this tvpe of pump it s preferable that the handle. which is indicated at 12, be directly connected to the pump rod in order that the downward pressure on the handle may be applied directly thereto, and, to this end, I have shown the handle 12 as pivotally mounted on the upper end of the pump rod., The handle is provided with a segmental gear 13 which meshes with a second gear, preferably in the form of a segmental rack 14, which is mounted upon a bracket 15 carried by the body portion of the pump and held against both reciprocatory and rotatory movements. The gear 13 is connected with the rack 14 by means of a connecting device which is pivotally connected to the rack and gear on the centers of their respective pitch lines. This connecting device is here shown in the form of a housing 16 substantially U-shaped in cross section and extending about the gear and the rack. The lower corners of the housing are pivotally connected with the gear and the rack, and the housing consti tutes not only the connecting link for maintaining the gear in constant mesh with the rack, but also constitutes a guard for these parts. While I have shown the combined connecting device and guard in connection with this particular style of pump, it will be obvious that it can be used upon pumps of other types.

In Fig. 3 I have shown a third application of the invention in which the handle 17 is pivotally mounted on a fixed bracket 18 carried by the body of the pump, which is indicated at 19. The pump rod, 20, which is reciprocally mounted in the body portion has a certain amount of movement transversely to the body portion in the plane of the handle. The pump rod is provided with a. segmental rack 21 which meshes with a segmental gear 22 carried by the handle 17, and, as the rack and gear move about the pivotal center of the handle 17 the upper end of the pump rod 20 will vibrate to accommodate itself to the movement of the rack. The rack and gear are connected by means of a link 23 pivotally mounted at its opposite ends on the centers of the pitch lines of the rack and gear, respectively.

In Fig. 4 of the drawings I have illustrated one method of applying the invention to a double piston pump in which the pistons move simultaneously in opposite directions. The pump, as here shown. comprises a base 24 having two cylinders 25 within which are mounted pistons 26. These pistons are here shown as tubular and the upper portions thereof project from the upper ends of the cylinders and have the operating devices connected directly thereto. As here shown, each operating device comprises an upwardly extending bar 27 which constitutes the pump rod and has secured thereto an inwardly extending segmental rack 28 which meshes with a segmental gear 29 pivotally supported on a. fixed part of the pump and provided with means for moving the same about an axis extending transversely to the pump rod and the line of movement of the piston. In the form of pump here illustrated the two segmental gears 29 are rigidly connected one to the other and preferably are cast integral with the handle sockets 30, of which there are two arranged at an angle one to the other. The segmental gears 29 are pivotally mounted on a supporting bracket 31 mounted on the base of the pump between the two cylinders. Each segmental rack 28 is held in operative relation to its segmental gear 29 by means of a suitable connecting device which is preferably pivotally connected with the rack 28 on the center of its pitch line and with the corresponding gear 29 on the center of its pitch line. As here shown the two connecting devices are formed in a single piece and comprise a single link or lever 33 pivotally mounted on the axis of the gears 29 and having its end pivotally connected to the corres onding racks 28. This construction is optional, however, and any suitable form of connecting device may be substituted for that here shown.

The operation of the device will be readily understood from the foregoing descri tion and it will be apparent that as t e handle is manipulated to reciprocate the pump rod the connecting device or link will hold the gear in its proper operative relation to the rack, and, inasmuch as the pitch centers of the rack and gear are always spaced apart the same distance, this connecting device will not cause the parts to bind, but, on the contrary, will hold them in such relation one to the other that there will be a minimum of frictional contact. It will also be apparent that the size of both the rack and the gear is materially reduced over what was necessary to the proper operation of the old style pump and that the construction of the operating mechanism as a whole has been simplified. It will also be apparent that the use of the invention re sults in a material gain of power over the old form of operatin mechanism. For example, suppose the distance from the center of the segmental gear to the pitch line of the same is 3% inches. With the old form of operating mechanism it would be necessary in order to get the same movement of the piston to connect the operating lever with the pump rod at a point 5% inches from the pivotal center of the lever, thus materially increasing the length of the lever and increasing the power necessary to operate the pump. In actual practice this gain of power is found to be from 25 to 30 per cent. It will also be apparent that the term pump rod as employed in the specification and claims refers to the connectin device between the rack and the piston an is not to be construed as limited to any particular form of pump rod, such, for example, as that shown in Figs. 1 to 3.

While I have shown several methods of applying the invention to pumps of different characters it will be understood that these are chosen for the purpose of illustration only and that the invention can be readily adapted to pumps of various kinds. I, therefore, wish it to be understood that I do not desire to be limited to the details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

Having thus fully described my invention,

what I claim as new and desire to secure by Letters Patent, is

1. In a pump, the combination, with a reciprocating pump-rod having a segmental gear connected thereto and traveling therewith, of a pump handle having an intermeshing segmental gear, a support for said handle, whereby a reciprocating and a pivoted segment are combined, and a link connection between the handle support and the pump rod by which one of said members is given lateral movement with respect to the other member as the rod reciprocates.

2. In a pump, the combination, with a reciprocating pump-rod having a segmental gear connected thereto and traveling therewith, of a pivoted pump handle having a segmental gear intermeshing with the firstmentioned segmental gear, whereby a pivoted and a reciprocating segment are combined, a ivoted support for said handle. and a linl connection between said pivoted support and said pump-rod by which said support and said pump-handle are given lateral movement with respect to said pump rod as the latter reciprocates.

In testimony whereof, I ailix my signature in presence of two witnesses.

PHILIP A. MYERS.

Witnesses:

W. W. INGMAND, R. M. Tomas.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

